/*

 JS Signals <http://millermedeiros.github.com/js-signals/>
 Released under the MIT license
 Author: Miller Medeiros
 Version: 1.0.0 - Build: 268 (2012/11/29 05:48 PM)
*/
(function(i){function h(a,b,c,d,e){this._listener=b;this._isOnce=c;this.context=d;this._signal=a;this._priority=e||0}function g(a,b){if(typeof a!=="function")throw Error("listener is a required param of {fn}() and should be a Function.".replace("{fn}",b));}function e(){this._bindings=[];this._prevParams=null;var a=this;this.dispatch=function(){e.prototype.dispatch.apply(a,arguments)}}h.prototype={active:!0,params:null,execute:function(a){var b;this.active&&this._listener&&(a=this.params?this.params.concat(a):
a,b=this._listener.apply(this.context,a),this._isOnce&&this.detach());return b},detach:function(){return this.isBound()?this._signal.remove(this._listener,this.context):null},isBound:function(){return!!this._signal&&!!this._listener},isOnce:function(){return this._isOnce},getListener:function(){return this._listener},getSignal:function(){return this._signal},_destroy:function(){delete this._signal;delete this._listener;delete this.context},toString:function(){return"[SignalBinding isOnce:"+this._isOnce+
", isBound:"+this.isBound()+", active:"+this.active+"]"}};e.prototype={VERSION:"1.0.0",memorize:!1,_shouldPropagate:!0,active:!0,_registerListener:function(a,b,c,d){var e=this._indexOfListener(a,c);if(e!==-1){if(a=this._bindings[e],a.isOnce()!==b)throw Error("You cannot add"+(b?"":"Once")+"() then add"+(!b?"":"Once")+"() the same listener without removing the relationship first.");}else a=new h(this,a,b,c,d),this._addBinding(a);this.memorize&&this._prevParams&&a.execute(this._prevParams);return a},
_addBinding:function(a){var b=this._bindings.length;do--b;while(this._bindings[b]&&a._priority<=this._bindings[b]._priority);this._bindings.splice(b+1,0,a)},_indexOfListener:function(a,b){for(var c=this._bindings.length,d;c--;)if(d=this._bindings[c],d._listener===a&&d.context===b)return c;return-1},has:function(a,b){return this._indexOfListener(a,b)!==-1},add:function(a,b,c){g(a,"add");return this._registerListener(a,!1,b,c)},addOnce:function(a,b,c){g(a,"addOnce");return this._registerListener(a,
!0,b,c)},remove:function(a,b){g(a,"remove");var c=this._indexOfListener(a,b);c!==-1&&(this._bindings[c]._destroy(),this._bindings.splice(c,1));return a},removeAll:function(){for(var a=this._bindings.length;a--;)this._bindings[a]._destroy();this._bindings.length=0},getNumListeners:function(){return this._bindings.length},halt:function(){this._shouldPropagate=!1},dispatch:function(a){if(this.active){var b=Array.prototype.slice.call(arguments),c=this._bindings.length,d;if(this.memorize)this._prevParams=
b;if(c){d=this._bindings.slice();this._shouldPropagate=!0;do c--;while(d[c]&&this._shouldPropagate&&d[c].execute(b)!==!1)}}},forget:function(){this._prevParams=null},dispose:function(){this.removeAll();delete this._bindings;delete this._prevParams},toString:function(){return"[Signal active:"+this.active+" numListeners:"+this.getNumListeners()+"]"}};var f=e;f.Signal=e;typeof define==="function"&&define.amd?define(function(){return f}):typeof module!=="undefined"&&module.exports?module.exports=f:i.signals=
f})(this);
